Du-Bro Low Bounce Smooth Wheels are Perfect for Trainer, Sport, Scale or Pattern Aircraft Models. FEATURES: Low-Bounce, Non-Treaded Rubber Tires Nylon Hub for Longer Wear INCLUDES: Two 2" Low Bounce Wheels SPECS: Width: 3/4" (20mm) Weight per Wheel: 0.75 ounce (21 grams) Center Hole Diameter: 1/8" (3mm) Outside Diameter: 2" (51mm) COMMENTS: Hubs fit 1/8" axles. May be drilled out to fit 5/32" axles maximum. NMH 3-5-92 upaxy5/23/98 updated JPG 3/29/02 ir/jl